Mercury 4.6L SOHC Specs
Mercury 4.6L SOHC engine specs: 281 ci (4.6L), 8-cylinder, 3.5512" bore x 3.5433" stroke, 9.4:1 compression.
Dimensions
| Displacement | 281 ci / 4.6 L |
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| Bore | 3.5512" |
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| Stroke | 3.5433" |
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| Cylinders | 8 |
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| Compression ratio | 9.4:1 |
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| Bore/stroke ratio | 1.002 |
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Construction
| Block material | cast iron |
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| Head material | aluminum |
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| Valvetrain | SOHC |
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| Fuel type | gas |
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| Advertised HP | 190–210 hp |
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What these numbers mean
| Bore/stroke character | 1.002 — square — bore and stroke are within 5%, a balanced compromise |
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| Mean piston speed at 6,000 RPM | 3,543 ft/min — in the range typical of performance street engines |
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| Displacement per cylinder | 35.1 ci |
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| Static compression | 9.4:1 — low by modern standards, generally happy on regular pump fuel |
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Variants sharing these dimensions (2)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
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| — | 190 hp | 4.6L SOHC, 4.6 SOHC, 4.6L SOHC V8, Romeo/Windsor 4.6L |
| — | 210 hp | 4.6L 2V, 4.6L SOHC |
Vehicles (7)
- Mercury Grand Marquis
- Mercury Marauder
- Mercury Cougar
- Mercury Mountaineer
- Grand Marquis
- Cougar
- Mountaineer
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